diff --git a/src/declarativeimports/plasmacomponents3/ComboBox.qml b/src/declarativeimports/plasmacomponents3/ComboBox.qml
--- a/src/declarativeimports/plasmacomponents3/ComboBox.qml
+++ b/src/declarativeimports/plasmacomponents3/ComboBox.qml
@@ -65,6 +65,7 @@
         text: control.displayText
         font: control.font
         color: theme.buttonTextColor
+        horizontalAlignment: Text.AlignLeft
         verticalAlignment: Text.AlignVCenter
         elide: Text.ElideRight
     }
@@ -94,6 +95,7 @@
     }
 
     popup: T.Popup {
+        x: control.mirrored ? control.width - width : 0
         y: control.height
         width: Math.max(control.width, 150)
         implicitHeight: contentItem.implicitHeight
@@ -119,7 +121,7 @@
             color: theme.viewBackgroundColor
             border.color: Qt.rgba(theme.textColor.r, theme.textColor.g, theme.textColor.b, 0.3)
             layer.enabled: true
-            
+
             layer.effect: DropShadow {
                 transparentBorder: true
                 radius: 4
diff --git a/src/declarativeimports/plasmacomponents3/ProgressBar.qml b/src/declarativeimports/plasmacomponents3/ProgressBar.qml
--- a/src/declarativeimports/plasmacomponents3/ProgressBar.qml
+++ b/src/declarativeimports/plasmacomponents3/ProgressBar.qml
@@ -30,10 +30,11 @@
     hoverEnabled: true
 
     contentItem: Item {
+        scale: control.mirrored ? -1 : 1
         PlasmaCore.FrameSvgItem {
             id: indicator
             height: parent.height
-            width: control.indeterminate ? units.gridUnit * 2 : parent.width * control.visualPosition
+            width: control.indeterminate ? units.gridUnit * 2 : parent.width * control.position
             imagePath: "widgets/bar_meter_horizontal"
             prefix: "bar-active"
             colorGroup: PlasmaCore.ColorScope.colorGroup
diff --git a/src/declarativeimports/plasmacomponents3/RangeSlider.qml b/src/declarativeimports/plasmacomponents3/RangeSlider.qml
--- a/src/declarativeimports/plasmacomponents3/RangeSlider.qml
+++ b/src/declarativeimports/plasmacomponents3/RangeSlider.qml
@@ -95,6 +95,7 @@
         width: horizontal ? control.availableWidth : implicitWidth
         height: horizontal ? implicitHeight : control.availableHeight
         anchors.centerIn: parent
+        scale: horizontal && control.mirrored ? -1 : 1
 
         PlasmaCore.FrameSvgItem {
             imagePath: "widgets/slider"
diff --git a/src/declarativeimports/plasmacomponents3/Slider.qml b/src/declarativeimports/plasmacomponents3/Slider.qml
--- a/src/declarativeimports/plasmacomponents3/Slider.qml
+++ b/src/declarativeimports/plasmacomponents3/Slider.qml
@@ -73,6 +73,7 @@
         width: horizontal ? control.availableWidth : implicitWidth
         height: horizontal ? implicitHeight : control.availableHeight
         anchors.centerIn: parent
+        scale: horizontal && control.mirrored ? -1 : 1
 
         PlasmaCore.FrameSvgItem {
             imagePath: "widgets/slider"
@@ -82,7 +83,7 @@
             width: parent.horizontal ? control.position * parent.width : parent.width
             height: parent.horizontal ? parent.height : control.position * parent.height
         }
-        
+
         Repeater {
             id: repeater
             model: control.stepSize > 0 ? 1 + (control.to - control.from) / control.stepSize : 0